# class and layout for one button display (with label)
<OneBut>:
    FloatLayout:
        Label:
            id: toplabel
            color: 0,0,1,1
            text: 'Hi there'
        Button:
            text: 'Hello'
            color: 0,0,0,1
            background_color: .9,.9,.9,
            on_press:
                root.butclick()